CN201161935Y - A lithium bromide absorption air-conditioning seawater desalination system - Google Patents

Abstract

A lithium bromide absorption air-conditioning seawater desalination system includes a lithium bromide solution circulation water production system, seawater evaporation and air treatment systems. Lithium bromide solution circulating water production system: generating condenser, heat exchanger, absorption evaporator, circulating pump, regulating valve group. Wherein the generating condenser includes a generator and a condenser, and a water retainer is connected between the two. Seawater evaporation and air treatment system: absorption evaporator, seawater spray chamber, preheater, regulating valve, throttle valve, valve group. The absorption evaporator includes an absorber and an evaporator, and a water retainer is connected between the two. The utility model can have the functions of air-conditioning and seawater desalination, which simplifies the two separate separate systems of the original air-conditioning system and seawater desalination circulation system, and effectively saves energy.

Description

A lithium bromide absorption air-conditioning seawater desalination system

technical field

The utility model relates to refrigeration equipment, in particular to a marine system capable of realizing air-conditioning refrigeration and seawater desalination at the same time.

Background technique

Marine thermal seawater desalination technology needs to evaporate seawater at the engine jacket water temperature of about 60°C, and seawater contains more calcium and magnesium ions, which are easy to form scale at this temperature. Seawater desalination technology must soften seawater, which increases the cost of seawater desalination; and the by-product of seawater desalination—concentrated seawater is discharged without being used. In fact, concentrated seawater has a strong ability to absorb moisture. On the other hand, in the marine climate environment, the proportion of latent heat load (humidity load) in the air conditioning load is much larger than that of the inland, and under the same conditions, the processing of the latent heat load requires lower cooling than the processing of the sensible heat load. temperature, which also increases the energy consumption of the refrigerator.

Utility model content

The technical problem solved by the utility model is to provide a system for simultaneously operating air conditioning and seawater desalination, which is mainly used in the air conditioning and seawater desalination systems of ocean-going ships and offshore platforms.

The technical problem solved by the utility model can be realized by adopting the following technical solutions:

A lithium bromide absorption air-conditioning seawater desalination system, including a lithium bromide solution circulating water production system, seawater evaporation and air treatment system, characterized in that: the lithium bromide solution circulating water production system includes a generating condenser, a heat exchanger, an absorption evaporation The lithium bromide solution circulation water production system is connected to the heat exchanger through the lithium bromide solution pipeline by the generation condenser, and the absorption evaporator is connected to the heat exchanger and the circulation pump through the lithium bromide solution pipeline, and the circulation pump is passed through the lithium bromide solution pipeline. The pipeline is connected to an absorption evaporator and a heat exchanger; the seawater evaporation and air treatment system includes a seawater spray room, an absorption evaporator, and a preheater; the seawater evaporation and air treatment system passes through the seawater spray room The concentrated seawater pipeline and the air pipe are connected to the absorption evaporator, and the absorption evaporator is connected to the preheater through the fresh water pipeline and the seawater pipeline.

In order to achieve the purpose of simplifying the system, the lithium bromide solution circulating water production system and the seawater evaporation and air treatment system share an absorption evaporator.

The absorption evaporator includes an absorber and an evaporator, and a water retainer is connected between the absorber and the evaporator.

The generating condenser includes a generator and a condenser, and a water barrier is connected between the generator and the condenser.

The generator, absorber and evaporator are equipped with spraying devices.

The main function of the water barrier located between the absorber and the evaporator is to prevent the concentrated lithium bromide solution flowing down from the generator through the heat exchanger from splashing to the evaporator when the absorber is sprayed, while maintaining the distance between the absorber and the evaporator. the water vapor passage between them.

The main function of the water barrier located between the generator and the condenser is to prevent the dilute lithium bromide solution pumped up from the absorber from splashing into the condenser when the generator is sprayed, and at the same time keep the water between the generator and the condenser vapor channel.

The generating condenser is connected with a jet vacuum pump for maintaining the vacuum required for the operation of the whole system.

Here, for the convenience of distinction, functionally, the whole lithium bromide absorption air-conditioning desalination system is divided into two circulation systems, namely lithium bromide solution circulation water production system, seawater evaporation and air treatment system.

On the one hand, from the function of the air conditioner, the seawater enters the spray device of the absorption evaporator through the preheater, and sprays onto the heat pipe heat exchanger, and the heat pipe heat exchanger of the evaporator absorbs the heat in the air to make the seawater Evaporate, concentrate, and separate into water vapor and concentrated seawater. The water vapor is absorbed by the concentrated lithium bromide solution sprayed down through the water retainer. The mixed air of air-conditioning fresh air and return air is sent into the seawater spray room. The concentrated seawater is sprayed in the seawater spray room, and exchanges heat and mass with the mixed air, so that the temperature of the air is moderately lowered and the cleanliness is improved, and the concentrated seawater is discharged after absorbing part of the heat, moisture and dirt of the mixed air. System; the mixed wind passes through the heat pipe heat exchanger in the absorption evaporator, and transfers the remaining heat load of the air conditioner to the seawater, so that the temperature and humidity of the air meet the requirements of the air supply.

On the other hand, in terms of the function of desalination of seawater, the concentrated lithium bromide solution sprayed by the absorption evaporator absorbs water vapor and is diluted into a dilute solution, which is transported by a circulating pump, and the heat of the concentrated lithium bromide solution is recovered by a heat exchanger to raise the temperature. After that, it is sent to the condenser for spraying. After being heated by the waste heat of the engine, it evaporates to form water vapor and concentrated lithium bromide solution; the water vapor passes through the water retainer and is cooled to condense into fresh water. Enter the absorption evaporator to spray and enter the next cycle.

Beneficial effects: ①. The seawater evaporates at a lower temperature, which can avoid scaling on the heat exchange tubes and simplify the seawater pretreatment process, that is, the seawater does not need to be softened.

②. The use of concentrated seawater to treat the air not only purifies the air, but also undertakes part of the air conditioning load, reducing the cooling load of the air conditioner, especially the humidity load.

③. Due to the reduction of the humidity load, the cooling temperature of the air conditioner can be increased, thereby improving the thermal efficiency of the air conditioner refrigeration system.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific illustrations.

A lithium bromide absorption air-conditioning seawater desalination system comprises a lithium bromide solution circulating water production system A, seawater evaporation and air treatment system B.

Lithium bromide solution circulating water production system A: generator condenser 1, heat exchanger 2, absorption evaporator 3, circulation pump 4, regulating valve group 81 (valve 811, valve 812), regulating valve group 82 (valve 821, valve 822) . Wherein the generating condenser 1 comprises a generator 11 and a condenser 12, and a water stopper 13 is connected between the two.

Seawater evaporation and air treatment system B: absorption evaporator 3, seawater spray chamber 5, preheater 6, regulating valve 83, throttle valve 84, valve group 85 (valve 851, valve 852). The absorption evaporator 3 includes an absorber 31 and an evaporator 32 with a water stop 33 connected between them.

The utility model can respectively realize the functions of air conditioning and seawater desalination, and the working process of each function is as follows:

Air-conditioning function, the seawater enters the spray device of the absorption evaporator 3 through the preheater 6, and sprays on the heat pipe heat exchanger, and the heat pipe heat exchanger of the evaporator 32 absorbs the heat in the air to evaporate and concentrate the seawater. Separation into water vapor and concentrated sea water. The water vapor is absorbed by the concentrated solution of lithium bromide sprayed down through the water retainer 33 . The mixed wind of air-conditioning fresh air and return air is sent into seawater spray chamber 5. The concentrated seawater is sprayed in the seawater spray room 5, and exchanges heat and mass with the mixed wind, so that the temperature of the air is moderately lowered, and the cleanliness is improved, and the concentrated seawater absorbs part of the heat, moisture and dirt of the mixed wind Exhaust system: the mixed air passes through the heat pipe heat exchanger 71 in the absorption evaporator 3, and transfers the remaining heat load of the air conditioner to the seawater, so that the temperature and humidity of the air meet the air supply requirements.

Seawater desalination function, the concentrated lithium bromide solution sprayed by the absorption evaporator 3 absorbs water vapor and is diluted into a dilute solution, which is transported by the circulation pump 4, and the heat of the concentrated lithium bromide solution is recovered by the heat exchanger 2. After heating up, it is sent to the generator Condenser spray 1, after being heated by the waste heat of the engine, evaporates to produce water vapor and concentrated lithium bromide solution; the water vapor passes through the water retainer 13 and condenses into fresh water after being cooled, and the concentrated lithium bromide solution passes through the heat exchanger 2 and enters the absorption after cooling down The evaporator 3 sprays and enters the next cycle.

The system can operate according to 4 working conditions, namely fresh water production and air-conditioning load matching, low air-conditioning load, pure fresh water, and pure air-conditioning refrigeration.

Working condition 1: The fresh water output matches the air-conditioning load, that is, the air-conditioning load matches the amount of steam evaporated from seawater. At this time, the valve 811, the valve 821, and the valve group 85 are fully opened, and the valve 812, the valve 822, and the valve group 83 are fully closed. The working process of the system is as described above.

Working condition 2: The air conditioning load is low. At this time, valve 811 and valve group 85 are fully opened, valve 812 and valve group 83 are fully closed, valve group 82 is properly opened, and part of the heat of condensation is used to preheat seawater, and the working process of the system remains unchanged.

Working condition 3: pure fresh water. At this time, valve 812, valve 822, and valve group 85 are fully opened, valve 811, valve 821, and valve 83 are fully closed, and valve group 82 is properly opened. Part of the heat of condensation is used to preheat the seawater, and the absorbed heat is heated through the heat pipe heat exchanger. seawater. The air-conditioning system stops working, and other working processes of the system remain unchanged.

Working condition 4: Pure air-conditioning refrigeration. Now valve 811, valve 821, and valve 83 are fully open, valve 812, valve 822, and valve group 85 are fully closed, and the system operates according to the lithium bromide absorption refrigeration cycle.

The utility model can have the functions of air conditioning and seawater desalination, which simplifies the two separate separate systems of the original air conditioning system and the seawater desalination circulation system, and effectively saves energy.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (7)

1. suction-type lithium bromide air-conditioning seawater desalination system, comprise lithium-bromide solution circulation water production system, evaporation of seawater and air treatment system, it is characterized in that: described lithium-bromide solution circulation water production system, comprise, condenser, heat exchanger, absorption vaporizer, recycle pump take place; Described lithium-bromide solution circulation water production system connects heat exchanger by condenser takes place by the lithium-bromide solution pipeline, absorb vaporizer and connect heat exchanger and recycle pump by the lithium-bromide solution pipeline, described recycle pump absorbs vaporizer and heat exchanger by the connection of lithium-bromide solution pipeline; Described evaporation of seawater and air treatment system comprise, seawater spraying chamber, absorption vaporizer, preheater; Described evaporation of seawater and air treatment system are connected the absorption vaporizer by the seawater spraying chamber by the concentrated seawater pipeline with airduct, absorb vaporizer and be connected preheater by fresh water line with seawaterline.

2. a kind of suction-type lithium bromide air-conditioning seawater desalination system according to claim 1 is characterized in that, the shared absorption vaporizer of described lithium-bromide solution circulation water production system and evaporation of seawater and air treatment system.

3. a kind of suction-type lithium bromide air-conditioning seawater desalination system according to claim 1 is characterized in that, described generation condenser connects jet vacuum pump.

4. according to claim 1 or the described a kind of suction-type lithium bromide air-conditioning seawater desalination system of claim 2, it is characterized in that described absorption vaporizer comprises resorber and vaporizer, is connected with the dash device between resorber and the vaporizer.

5. according to claim 1 or the described a kind of suction-type lithium bromide air-conditioning seawater desalination system of claim 2, it is characterized in that described generation condenser comprises producer and condenser, is connected with the dash device between producer and the condenser.

6. a kind of suction-type lithium bromide air-conditioning seawater desalination system according to claim 4 is characterized in that described producer, resorber, vaporizer are provided with spray equipment.

7. a kind of suction-type lithium bromide air-conditioning seawater desalination system according to claim 5 is characterized in that described producer, resorber, vaporizer are provided with spray equipment.

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